Detectives in New York are searching for a female suspect who fled a subway station after a man was fatally pushed in front of an oncoming train on an elevated platform in Queens.

At 8:04 p.m. on Thursday an unnamed man was standing on the northbound platform at 40th Street and Queens Boulevard, waiting for the No. 7 train. Witnesses told police that a woman had been walking back and forth on the platform and talking to herself before she took a seat on a wooden bench on the platform.

As the No. 7 train approached the station, witnesses said the woman rose from the bench and pushed the man, who'd been standing with his back to her, onto the tracks.